Automatic stripper machine



Jan. 15, 1929.

J. H.. BESSER AUTOMATIC TRIPPER MACHINE Filed Aug. 31. 1926 .5 Sheets-Sheet 1 INVENTOR 'Jease H. B esser BY M AQ Jan. 15, 1929.

1 1,699,218 J. H. BEssER AUTOMATIC 'STRIPPER MACHINE Filed Aug. 31, 1926 5. Sheets-$hnet 2 mvENTdR ksse EBesser BY f9 g ATTORNEY Jan. 15, 1929. 1,699,218

. J. -H. BEssER I AUTOMATIC .STRIPPER MACHINE I Filed Aug. 51, 1926 5 Sheats-$heet 3 INVENTOR Jssefi. Besser ATTORN EY 1m 15, 1929. J. H. BESSER AUTOMATIC STBIPPER MACHINE Filed Aug. $1.; 1926 5. sheath-"Slim 4 szlilllltnllfirl NVENTOR Q Jsse 1]. Bauer- ATTORNEY Jan. 15, 1 929.

J. H- BESSER AUTOMATIC S TR IPPER MACHINE INVENTCSR Jsse 17 Besser ATTORNEY Patented Jan. 15, 1929.

UNITED STA/T155 r 1,699,218 PATENT OFFICE? mass 11. aassna, or Atrmu, moment. i

AUTOMATIC STRIPPER IACHINE. A

Application filed August 81,1926. Serial 1T0. 132,690.

My invention relates to automatic stripper machines and more especially to molding machines wherein the mold is removed automatically from the finished block, the block l being-held stationary in position by certain mechanism while the mold is stripped off from the block by other means.

My block machine effects the ready removal of themold box from a finished block of the perforated type. Heretofore some machines have been designed to remove the mold from a solid block or other molded .product while the latter was held stationary, but such former mechanism was not used for removing the cores for producing hol:- lowor perforated blocks while the latter was stationary, and the removal of the cores was quite as essential as the removal of the outer mold walls, and presents a much more diflicult problem.

To mold'hollow blocks, as of concrete or other moldable'material, the latter is tamped andpacked tightly about the cores so that v a real problem is presented of loosening the .25 cores from the material. This is especially difiicult when the operation is to be performed rapidly, without injury to the block. A further problem is presented, when it is desired to loosen the material from the cores when the latter'are supported upon an imperforate pallet. Heretofore, concrete blocks have been molded upon pallets which have openings therethrough to receive the cores therein, so that the removal of the cores was assisted by the use of the pallet .to hold the block stationary while the cores were being withdrawn. This operation made necessary the provision of a set of perforate pallets for each type of blocks to be molded. If a slight change in the size or form of the cores were to be made, an entirely new set of pallets with corresponding erforations was required. This provision 0 several sets of. metal or non-metal and perforated pallets often required an expense of many thousands of dollars for pallets alone.

By my new machine provided with my new stripper mechanism for holding the hollow blocks stationary upon the pallet while the mold and the cores are lifted from the block at one time, I am enabled to accomplish the stripping operation while the blocks are molded upon wholly imperforate pallets, and by this provision the same pallets may be used for blocks of different sizes and form having differentv openings therein and even a different number of openings therein, it being only necessary that the pallet shall be at least as large in surfacearea as the base of the block externally. Any

'- blocks that are hollow as well as solid may by my stripper mechanism be automatically stripped from pallets of one standard size, thus resultin in wide economy.

It is an ob ect of m invention to provide a stripper element that shall swing into position over the block and cover very accurately the surface of the block for the purpose of permitting the mold and cores to be raised from the finished block.

It is a further object of my invention to provide avmachine having tamping means for packing moldable material about cores within a mold together with mechanism for moving into position for holding the blocks down upon the mold support while other mold with its cores is raised up out of engagement with the block.-

It is a still further object of my invention to provide an automatic machine which, though driven from a single source of power, comprises tamping means for packingmaterial in a mold about spaced cores therein, means to raise the mold and cores above the finished block, and means to move a stripper means into position over and upon the block when the tamping action is complete and to move said means'away from such position after the block is stripped out of the mold, there being means provided to actuate the Various parts from said source of power at a predetermined order of,sequence.

With these and other objects of .my invention which will appear as the description proceeds, my invention consists of the structure-and functions of parts as described hereinafter, as recited in the appended claims, and as illustrated in-the accompanying drawings, in which- Figure 1 is a side. elevation of the molding and stripper machine, the mold box shown in its lower position and the stripper mechav mounted near the front portion of mold box and cores raised above the block,-

and the stripper swung inward to a position directly above the block and resting thereon;

5 Figures 4 and 5 are central, longitudinal, vertical sections of the machine, the former 'shown looking toward the right side of the machine, and the latter looking toward the left side; 1

Figure 6 is a sectional plan view looking downward fromthe plane indicated by the line 6-6 of Fig. 5;

. Figure 7 is a vertical, central, longitudinal section of the mold box and'cores with the carriers for the cores, and

Figure 8 is a perspective viewof a finished block. 5 i

The machine parts are'mounted on spaced metal bars, certain of them, 14, extending longitudinally of the machine and spaced in a lower horizontal planetoform a base, while others are in a higher plane to guide higher portions of the mechanism, andsuitab y mounted vertical bars 15 connected with 14. On an elevated portion of the frame, a transverse drive shaft 11 is theframe and a drive pulley 10 mounted on one end of this shaft at the right side of the machine, and detachably connected therewith for driving power by a suitable clutch 27 controlled by a lever 28. 1 Somewhat to the rear of 11 and slightly lower than the latter is mounted a transverse shaft 12 extending beyond the side frames of the machine on either side. a

. machine is devised especially for mol 1n g hollow. blocks of the general type .9 illustrated in Fig. 8. The articular block there shown has three centra o enings 8 and concave end openings or epressions 7 whereby two blocks may be positionedencl I to end and have openings substantially uniform. To formsuch .block, central cores are required for the inner openings in the block, and convex half-cores are re uired at the ends of the mold to form the en depressions of the block. It is ap licants intention to mold the ,block material about these several cores,-and then while fioositively retainlng the block upon the pa et, raise the mold as well as the various cores off the block at one time.

The mechanism by which this may be done will now he descrlbed.

It should first. be noted that applicant" molds his blocks while supporting them upon substantially imperforate pallets. For ordinary operations in molding hollow blocks, the pallets may be practically uniform in size and shape for difierent sizes of blocks. The only requirement is that the pallet shall be at least as large in surface area as the largest block to be molded. These pallets 17 are fed into the machine from the lefthand side manually through the trough or pallet track 46, between frame bars 15 and 47, as shown in Figs. 2 and 3. Bars 16 project forwardly from the frame beyond the mold box and at their forward ends serve for a final deposit support for the finished block still resting upon the pallet upon which it was molded. When 'the pallet is fed into the machine, it takes the position shown in Figs. 2 and 4. From here the allets are fed forward by longitudina lysliding bars 48 having each two notches in .their upper edges one in the rear of the other, which providea shoulder 49, in each which face toward the front, and will serve to push the rear pallet forward to the position directly beneath the tampers 26, and the forward pallet further forward to a po,- sition on the bars 16. InFigs. 2, 4 and 6 are illustrated the two positions of the pallet before the finished block is deposited upon the bars 16 from where it is to be carried away to curin platforms. The feeding bars 48 normally eed two pallets 17, forwardly at the same time, depositing the forward one with its molded block thereonupon the bars 16, and the rear pallet to vthe intermediate position beneath the tampers.

Preparatory to the moldingoperation, the

mold box is positioned upon thepallet when elongated side plates 29 which are so con nected with other actuating parts that'they serve to carry at times the entire mold box including the cores.

Adjacent th front end of the machine and at the' side portions, are secured vertical guide standards 20 upon which carriers 21 may travel, being mounted for reciprocation thereon by having sleeves 31 which encircle v the standards loosely. The carriers 21 ma be formed of any suitable'designthat wil result in positive guidance of the same on the standards 20. As shown in Fig. 3, they are formed of spaced sleeves 31 connected together by longitudinal flanges 66 which are connected by webs 64 which are spaced from the standards. As shown in Fig. 3, the ends 65 of the side plates 29 of the mold are mounted just outside the flanges 66 so that the flanges and webs are between the ends 65. Apertures are formed in these flanges and the ends 65, and the carriers and which is connected. with the cam arm '72 by the link 73. The roller 74 on the arm 72 follows the cam 75 whereby the rotation of the shaft 12 causes intermittent rising and .falling of the mold.

I propose to carry the cores upon portions of the mold w-a'lls. For this purpose, I use hollow cores and 38, the central cores 30 having open bottoms and top closures 33 which have ventopenings 34 but are otherwise closed. To carry these cores 30, I pro-- vide the side plates 29 with spaced slots at their upper edges for receiving therein a series of core supporting bars 19 which are thus held in proper relation to the mold and to each other by the provision of a slotted edge of the plate 29 itself, or of a super posed horizontal plate 76 at either side of the plate 29, as shown in Figs. 1 to 6, more scores 30 and 38 with them. Reference has been made to mechanism for retaining the molded block 9 upon the im-' especially, the said slots 77 of the plates 76' receiving the bars 19 therein and fixing them in accurate position and thereby accurately positioning the cores 30 in the mold box. In addition to the slotting of a plate to receive the support bars therein, the bars 19 are themselves notched at their lower edges at 78 to receive therein upper edgesof certain edge portions of walls 29 and portions of the block itself when complete, this feature being shown more particularly in Figs;4and 5. These insert arrangements of the bars 19 on the walls of the mold have a very positive function which will be described more in detail later.

The end half-cores 38 are shown very clearly in Fig. 7, and in general outline in Fig. 6, having a convex inner surface and an outer protuberance 79 near the upper edge which fits into the notch in the end plate 18 at the end of the mold, which provides a shoulder 80 upon which the part 79 rests so that the end walls of the mold carry the end cores 38. An interlocking engagement between the ends of the plates. 18 and the inner surface of the side walls 29 holds the cores 38 against the plate 18. From this arrangement, it results that the end cores. are carried by the end walls of the mold, while the intermediate cores 30 are carried by the bars 19 which rest upon some portion of the mold, walls 29. From this structure it will be evident that raising the ends of the walls '29 will lift the perforate pallet 17 while the mold and the cores therein are raised therefrom. This means will now be described. This retaining element comprises spaced arms 22 which are pivoted at 23 in an upper portion of the frame for swinging outwardly and inwardly from the front of the machine, the extreme outer position being limited to one not quite beyond thc outer ends of the bars 19, and the inner limit being a position directly above the mold. The arms 22 are. curved in planes longitudinal of the machine so as to insure the inner edges of the arms intermediate their ends avoiding possible contact with the front arts of the machine. On the lower ends o these stripper arms 22 is mounted a horizontalplate 32 from which are suspended stripper heads 24 each of which has the outline approximately that of a section of the finished block 9. These heads therefore, rest upon the several sections of the block while the ascending carriers' 21 lift the mold box, bars 19 and their cores off the pallet 17, thus stripping the mold and cores from the block. After this last operation is completed, the'mold is low- .ered and the stripper mechanism 22 and 24 is swung outward to inactive another block is molded.

The cores 30 and 38 are ordinarily hollow, as shown in Fig. 7, the lower end being 0 en. Cross slots 35 are usually'provided in t e upper ends of'the cores 30 in a vertical position until plane, to receive therein portions of the supporting bars 19, this portion being appropriately the edge between the lower notches 78. The core bars 19 and the'upper portion'of the cores 30 are also provided with transverse openings 36 positioned in registration when the parts are assembled, so that bolts 37 may be inserted to lockthe cores and bars together. By my mechanism, there is the same number of cores 30 that there are cavities required in the finished block, the end cores 38 providing for the end depressions 7. There is therefore, one less core 30 than there are main tampers 26, and the same number of mold sections of the 1- form that there are stripper heads 24 to rest thereon. The heads 24 are separated from each other sufficiently to receive the supporting bars 19 between them, so that the latter serve not only for suspending the cores from a swung inward into position over the mold.

The stripper element is actuated in its swinging movement by a rearwardly-extending rod 39 pivoted at its forward end 40 to a projection from the plate 32, and at its rear end to the rocking arm 41.

It .is essential in my automatic, continuously-operating machine, that the movements of the feedingmeans for supplying the moldable material to "the mold and the stripper means for the removal ofthe block from the moldshall properly coordinate, I have rovide'd novel means for feeding the material forward in the interval when the mold box is in its lower position, and the stripper element swung to the outermost position. To accomplish this, I provide a feed box 42 mounted for horizontal and longitudinal reciprocation. This box 42 is of suitable width to cover the entire set of openiugs'in the mold between the several core members and 38. It is made up of side walls whose forward ends are cut somewhat oblique to the vertical with their lower portion directed slightly inward. To these ends is attached the end board or plate 81 having on its inner lower surface a metal shoe 82 which scrapes off the material from the supporting surface upon which it travels.

The rear ends of the'side walls are spaced apart by a horizontal plate 83 positioned above the lower edges of the walls somewhat,

' the openlng 45.

as shown in Figs. 4 and 5. The forward end of this plate 83 is angular, providing a toe 84 which, with the end plate 81, and side walls form a shallow tube or spout for feeding material therethrough and out of the open end 45. The parts 81, 82, 83.. and 84 therefore, forman efiicient feed box 42 which may receive material upon the plate 83 but especiallyin the tube directing it to The box 42 travels forward to the position indicated in Figs. 1 and 2'where its contents are dropped into the mold box around the cores. Then in the following cycle of movements, the box is returned for receiving other material.

Since it is obvious that the feed box 42 must be guidedvery accurately in its travel backward and forward, because ofthe registration of the opening 45 over the mold bein essential, I have provided a support plat orm 85 upon which the feed member 42 is to travel, and further provide a wheel or roller 86 on this platform to directly contact the box 45, and also provide the platform 85 with spaced bars 87 which shall be in direct alinement with the'support bars '19, at the same time slotting the lower edge of the shoe 82 and of the toe 84 to receive th'erein'the said guide bars 87 for guiding the feed member 42 especially in the rear portion of its travel. In the forward portion of its travel, the support bars 19 will enter the same slots in the parts 82 and 84.

As a further explanation of this operation, it should be observed that the mold box is down while the feed box is in its forward position, and the box 42 is at the rear while the mold box is in the upper position. While in this rear position, the feed box receives an additional load from any appropriate source, whose details are not a special feature of the present invention. However,

spout for directing material into 42at the I proper time.

Means is provided for actuating this feed box 42 mechanically comprising a link 44 pivoted at one end to the box and at the other to the arm 41. The latter is actuated by the rock shaft 43 which carries another arm 89 having a roller 90 which follows the outline of the cam 91 which will operate the stripper mechanism and the feeding mecha nism in proper sequence. The cam 91 therefore, controls both mechanisms-stripper and feed-elements which are otherwise independent. At the rear of the shaft 43 is another rock shaft 92 mounted upon the frame and provided with rock arms one of which, 93, has connection 94 with the arm 41, and another portion 95 is 'detachably connected with expansible springs 96'havingtheir lower ends secured to the frame at 97. The exact details of parts 93 to 97 are not directly related with the patentable features of this machine. In Fig. 2 of the drawings, however, is shown the link 98'and expansion spring 99 connected with the arm 89 the rock shaft 69, is mounted for. partial rotation the rock shaft l02 having a pair of arms 103 normally extending approximately parallel with the feed bars 48, and bearing at their ends, support rollers 104 which contact the lower edges of the said bars 48 to serve to raise or lower the forward ends thereof. Upon the same shaft 102 projects rearwardly the arm 105 having at its end the nut connector 106 adapted to receive therein the threaded end 107 of the link 108. Arm 105 has also at its side and secured thereto an car 109 and fitted to receive there in a screw 110 which may be adjusted therein so that pressure applied to the head of said screw will actuate the shaft 102 and the roller 104 to the desired extent. The opposite end of the link-108 is connected to an arm of another rock shaft 111 which by an arm 112 is connected with an arm 113 on the shaft 43, whereby the cam 91 and arms 113 and 112 will actuate the roller 104'and raise the forward ends of the bars 48 as may be desired. The threaded end 107 may be adjusted to determine the extent of movement of these feed bars.

The feed bars 48 have a compound movement including a lon itudinal, reciprocating.

action by reason of t e cam 58 actuating the roller 57 on the arm 56 and the connection of the link 55 with the arm 53 having the wei ht 54, so that as the arm 53 rocks with its shaft 52, the roller 57 willhug the cam.

. which extend forwardly from the machine,

The shaft 52 is further provided with an arm 51 connected with the bars 48 vby link 50, so that cam 58 operates-the pallet feed.

, ends of the bars-48 upward when'the weights 60 are drawn some distance. to the rear of the rollers 62. But when the bars 48 are pushed forward to their extreme position, the forward ends tend to drop downward until supported positively upon the rollers 104. A high portion of cam 91 willtherefore rock shaft 43 in a direction to positively the forelevate the rollers 104 and thereby u e pa ets ward ends of the bars 48 and t carried thereon.

These bars 48 parallel the fixed bars 16 the forward ends 61 of 48 being somewhat wider than fixed bars 16, and the rollers 104 being intended to raise the forward ends 61 above the upper edges of bars 16 while the pallets are being fed forward in empty con-' dition, but said ends 61? lowering shghtly in their. intermediate position in which" the finished block is deposited thereon, so "that the pallet beneath the tampers, after receiving the block'thereon and the mold having risen, is now pushed forward and deposits on the bars 16, after which the forward ends 61 in the, lowered position are drawn backward to the position shown in Figs. 1 and. 4. Referring to Fi 1 especially, a new pallet is now fed into t e machine by an attendant manner.

of the same is accomplished by the yielding of the arm 112 and link' 108 in the following Arms 112 and 113' are connected by a'link 114 including therein a sleeve 115 and a plunger element 1l6-extending thereinto and having an enlarged end 117 between which and an annulus 118 integral I with the outer end of the sleeve is mounted a compression spring 119 coiled about the plunger rod-116,- thereby resisting an elon-' gating tension applied to the part 114. -B this arrangement, the cam actuating the roc shaft 43 may be positive in its action and yet the roller 104 permitted to yield downwardly byv means of the compression of the spring 119 in the sleeve 115,

Use is made of this structure 108-112- 113114 and 115116 to' lower-the roller 104- sliglitl without changing the general outline oft V eemain cam. 91, so that the block having been pushed forward over the sta-j tionary bars 16, may be deposited upon the latter before withdrawing the bars 48 for another pallet. To do this, the shaft 69 actuated by the cam Z 5 and arm 70, carries an additional arm 120 which rocks therewith, and whei gthe link 25 rises to lift the mold box from off the block, thereby rocklng'the shaft 69 in a counter-clockwise direction, as seen in Fig. 2, arm 120 strikes the head of the screw 110 thereby causing the shaft 102 to rock clock-wise thus lowering the roller 104 with the ends 61 of the bars 48 and depositing the pallet with its block on the supports '16, And this is done in spite of the connection of the shaft 111 with the arm 113 on the cam-driven shaft 43, for the sprin 119' permits this relative movement wit in the sleeve 1-15. The extreme upper position of the mold by means of the arms 25' therefore rocks the shaft 102 slightly and lowers the rollers 104 accordingly. The shaft 69 then reverses and permits the mold to lower and the arm 51 swings backward and draws the bars 48 rearward.

- Some of the structure used in my complete machine is more or less conventional and will not be described in detail, nor claimed per se. In addition to the rather usual tampers 26 which may be raised by rotatin members 121 mounted upon the shaft 11, provide sub-tampers or jiggers 122 which ternate with them. For a machine therefore, having three inner cores 30 for making a block with three inner cavities, four main tampers 26 will be required and five jiggers. The latter have thin feet 123, are light in weight, and are provided with bent arms 124 are actuate by arms 125 secured to a rock shaft 126 actuated in turn by an arm 127 connected to a link 128 pivoted to an arm 129 of a roller element 130 which rides on the periphery of the cam mounted on the cam shaft 12. The roller 130 is further guided by the arm 131 pivoted to the frame at 132. During about one half of the rotav 124 for actuatin the members. These arms, a

tion of the shaft 12, the members 122 are held out of active position, such position being taken once during every rotation of the cam shaft. I

The said members 121 are arranged in pairs and together carry a transverse shaft or rod 133 w attached'to therseverabtampers 26 and lifts the latter until'the rod 133 slides out from under the bars 134 andpermit the battery of tampers 26 to fall together. Means is provided for locking the main tampers in the in upper position during certain periods ofthe various movements, and this includes a frame ich strikes the lifting bars 134 member 135 extending'forwardly from the a connecting rod'13 which may be brought under the said bars 134 and hold them in a given raised position. Upon the same shaft bearing the arms 136 is an actuating arm 138 connected with arm 139 by link 140, the arm 139 being pivoted upon the frame block 141 and having a roller 142 which follows the outline of cam 143 on the common cam shaft.-

The high portions of this cam thrusts the .ing of the parts to act as a shock absorber.

This structure includes links 147 on which the rod 133 is directly mounted, and a cushion member 148 of some appropriate yieldable material between the rod and the base support of 144. It is thus seen that the tampers 26 are actuated by the members 121 driven directly from the drive shaft 11, while the sub-tampers 122 are actuated by the rod 126 which is given a vibratory action from a cam 100 mounted on the cam shaft 12 which rotates much slower than 11 because of the reduction gearing 13. The tampers 26 are raised and dropped once for each rotation of the shaft 11, while the jiggers 122 are vibrated five times at each rotation of the shaft 12. The two devices operate together, though with quite different form of movement.

Operation: The clutch 27 having thrown in, and the belt being applied to the pulley 10, the cam shaft 12 is driven much slower than the pulley 10. The mold box is -.-reciprocated vertically by cam 7 5, the feed box 42 reciprocated horizontally by cam 91, and the rollers 104 raised while the box 42 is at its rearward position. The stripper mechanism 22 is operated in much the same order as the feed box, the stripper being swung outward at tlie same time that the 7 box 42 is moved forward, since both glevices are actuated through the medium of the same arm 41. The pallets 17 are moved forward periodically by the bars 48 underthe control. of the cam 58. The. two cams 58 edge. of

and are of such contour, and are relativel mounted upon the shaft 12, so that the nished block and the pallet on which it rests, are moved outward from their position shown in Fi 5, to an extreme position on the fixed end ars 16, immediately after which the mold box together with the cores therein and the bars 19 carried thereby, are lowered to the position shown in Figs. 1, 2, 4 and 7, in which views the former finished block and its pallet have been taken away-- 12% an attendant; Thelower front" usually bars 19' beveled at 149.120. per

been mit larger vertical space between the bars 19 and the support bars 16 for receiving the finished block until its removal. As the pal.- let 17 under the stripper head, in Fig. 4, is about to advance (as soon as the mold is raised therefrom), the toe of the arm 120 strikes the screw 110 and positively rocks the shaft 102 sufiiciently to lower the rollers 104 to slightly release the pallet and block, just as the stripper heads 24 have taken their position over the block sections, preparatory to permit the raising of the mold box and cores therefrom. I

In all these various ope-rations of the complete cycle, the bars 19' serve three distinct functions-that of supporting the cores 30 in proper relative position in the mold box, guiding the heads 24 into proper relative position between the several cores, as seen in Fig. 3, and further that of guiding the feed box 42 into the outer position as shown in Figs. 1 and 2, by means of suitable slots in the parts 81, 82 and 84 which receive said bars 19. The feeder 42 while supported at its rear end by the roller 86, has its downwardly-turned edges of parts 82 and 84 borne by gravity against the floor plate 150 which is stationary. back the feeder 42 and the strippers 24 after whichthe mold box and cores rise while the parts 24 are in position over the block sections, the finished block is. then pushed forward, when the mold again lowers into position over the next pallet, just pushedinto position under the mold, the feeder 42 and stripper 22 again traveling forward, the

The cam 91 'meanwhile draws formerto dropmaterial into the mold about the cores 30 and 38, and the latter remaining inactive in its, outer position until this second molding is complete, thus completing the molding cycle of the machine.

It is of course to be understood that this machine is especially effective in molding hollow blocks, since it is, provided, with special structure for loosening the block material from the cores in the mold which are carried thercin. The machine may however, be used as well for molding solid products,

if it is desired, and the size of the mold walls may be varied within the limits of the supporting pallets, as has been explained heretofore. The shape and size of the cores may be changed and others secured to the bars 19, without seriously interfering with the general operation of t 1e machine, as will be readil understood. The eneral operation of t e tampers 26 and j1ggers122 has not been elaborated u on since no special patentable' novelty is c aimed for them, per The locking of the tampers 26 at times in their uppermost position'by the cam 143 and arms 136, rod 137 and connecting parts, is arranged-in. proper relation to the mold ingand stripping means, aswill be-understood from the drawings: I

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: I

1. In .a molding machine, a mold comprising sides and cores, the cores being supported from certain of said side's, means for pressing the molding material into said mold, means for retaining the molded block in its finished position, and means for moving said mold vertically away from the block. i

2. In a block molding machine, a mold comprising sides and cores, means for supporting a pallet beneath said mold, means for packing the molding material in said mold and means for retaining the molded block upon the pallet, means for operating certain o 3. In a-mo the said packing means and retaining means alternatively, and means for moving said mold verticall away fromthe pallet.

l ding machine, the combination of a mold, means for feeding the mate-, rial into the mold, means for tamping the material in. the mold, stripping means for retaining the molded blockin its lower position, and means for lifting the mold from the block. 4. In a molding machine, the combination of a mold, means for filling the inold with material, means for tamping the material in the mold, means for applying downward pressure upon the upper surface of the finished block,-and means for lifting the mold from the block.

5'. In a block molding machine, a mold, means for supporting the mold in operative position, means for filling the mold with "moldablematerial, means for reciprocating the filling means horizontally into position over the mold and away therefrom, means for retaining the moldeclblock upon said supporting means, and means for moving said mold vertically away from the block.

6. In a block molding machine, a mold comprisin walls and cores suspended from' said walls, means for tamping material in the moldabout the cores, means for retaining the molded product in its molded position, and means for lifting the walls and cores oil the said product.

7. In a block molding machine, a mold 'com rising sides and cores, means for supportlng the mold and cores in operative position, means for filling'the mold about the cores with moldable material, means for packing the material in the mold, means for retaining the molded block upon said supporting means, and means for moving said mold verticall away-from the block.

8. In a moltfing' machine, the combination of a mold and vertical cores supported within the mold, means for tamping material in the mold about the cores, means includings aced'stripper heads having thecontour of the block sections between .cores, movable and means for lifting the mold and cores off the block while thesaid heads are upon said block.-

7 9. In a block molding machine, a mold comprising sides and cores, the latter being suspended from said sides, means for supporting the mold and cores in vertically movable and operative position, means for pressing upon the upper surface ofthe molded block while still in the mold, means for filling the mold about the cores while supported in operative position, and means for moving said mold vertically away from the block.

10. In a block molding machine, the combination of a mold box including side and end walls and open top and bottom, transverse, spaced bars attached to the upper edges of certain walls of the mold and vertical cores-suspended from said bars within the mold, a feeder element mounted for horizontal movement in said machine and over said mold and said bars serving for guiding said element in its forward travel,

and actuating means for said element.

11. In" a block molding machine, the combination of a frame, vertical guide members fixed in said frame in parallelism at the respective sides of said frame, a mold box having side and end walls, guiding members at the ends of said box for engagin said verti.-- cal members, actuating means or reciproeating the guiding members on said vertical members, spaced supporting bars in said machine extending lengthwise of the same and at right angles to-said box, movable bars guided in the machine frame parallel to said supporting bars and having notched upper edges for receiving pallet blocks therein,

'into and out of register with said sections,

means for actuating the movable bars forward and backward to feed pallet blocks thereon forward'to a position directly underneath said mold box, and common actuating means for operating the mold box vertically, and the feed bars longitudinally. I

12. In a block molding machine, the combinationof a frame, vertical guide members fixed in said frame in parallelism at the reto said mold box, movable bars guided in the frame parallel to the su porting .bars and having notchedupper ges for receiving pallet blocks therein, feedmg means at one side of the machine directed transversely toward the movable bars at a position atthe rear of the mold box, 'means for actuating the movable bars forward and backward to feed pallet blocks thereon forward to a posi- I tion directly underneath said mold box, and

13. In a block molding machine, the combination of a frame, a mold box mounted in 1 said frame for vertical movement therein,

spaced supporting bars in said frame lengthwise of the machine and at right angles to said box, movable bars guided in the machine frame parallel to said supporting bars and having notched upper edges for receiving pallet blocks therein, means for normally holding the forward ends of the movable bars upward with their upper edges slightly above the stationary supporting bars to engage the pallets thereon, means for positively lowering the forward ends of the movable bars when the latter reach the forward position thereof to release the engagement of the pallets by the movablebars, and common actuating means for operating the mold box vertically and the movable bars longitudinally.

14. In a block molding machine, the combination of a frame, a mold box mounted in said frame for vertical movementtherein, actuating means for reciprocating said box in said frame, means for supporting a pallet beneath the mold box when the latter is in its lower position, stripper mechanism comprising spaced bars pivoted on said frame at points materially higher than the normal position of said box, and for movement of their lowerends in parallelism in vertical planes parallel to the length of the machine, a flat plate secured to the lower ends of the said bars and stripper heads secured'to the lower surface of said fiat plate, said heads having a length somewhat greater than the height of the mold box and each head having a cross outline substantially that of a section of the molded block, and the supportingbars of the stripper mechanism being of such length that the said heads may rest upon the block sections, and actuating means for swinging said stripper mechanism on its pivots to anoutward position beyond the mold, or inward to a position directly above the mold box,

15. In a block molding machine,'a mold mounted for vertical movement away from the molded block, stripper means pivoted to the frame for movement over the mold and outward therefrom, a feeder mechanism movable horizontally over the mold and away from it in a direction opposite to the movement of the stripper, and a transverse bar mounted on said mold serving to guide the feeder and stripper in their respective movements, the latter having slots therein for receiving the said transverse bar therein for said guiding function.

16. In ablock molding machine, the com;- binations of-a.- mold having open top and bottom, and side walls extended beyond the ends of the shorter walls, .Vertical frame standards, carriers mounted for vertical movement on said standards and means for securing the ends of the side walls to said carriers, means for actuatin the carriers on their standards, means for Filling said mold while the latter-is in its lower position, stripper mechanism pivoted above the mold for forward and backward movement of the mechanism into outer disengaged position and inward over the said mold, and common actuating means for swinging the stripper mechanism outward while the mold is'in down position and the filling mechanism is forward over the molded block, and for swinging the stripper mechanism inward over the mold and the filling mechanism backward while the carriers are raised to lift the mold off the block.

17. In a block molding machine, the combination of a mold box including side and end walls and open top and bottom, transverse, spaced parallel bars attached to the upper edges of the side walls, vertical cores suspended from said bars within the mold,

one. to each, frame means for guiding the said mold box Vertically in reciprocating movement, a feeder element mounted for horizontal movement back and forth between a forward position directly over said mold and a rear position out of alinement with the mold, and means for actuating the mold box in vertical movement and-the feeder element in coordinating horizontal movement, to direct molding material into the mold and lift the latter from the block.

18. In a block molding machine, the combination of a mold box including side andend walls and open 7 top and bottom, the upper edges of the side walls having spaced notches therein, the forward notches being in alinement with those in the rear and transverse thin bars resting vertically in the said notches of the side walls and vertical cores suspended from the lower edges of the bars within the mold, frame means for guiding the mold vertically in reciprocating movement, a feed box mounted for horizontal movement lengthwise of the machine, the extreme forward position of the feeder being directly over said mold when the latter is in its lowest position, stripping means pivoted on a horizontal axis to oscillate thereon and rest upon the molded block when the feeder element is withdrawn to the rear, the said bars serving to guide the feeder element in its forward and the stripper element in its rearward movement and actuating means for oscillating the stri per, reciprocating .the

feeder element-and ifting the mold box.

19. In a block molding machine, the com- -bination of a frame, a vertically recipro-.

mold box in its movement, spaced sup orting bars mounted fixedly lengthwise o the machine and at right angles t o-said box, movable bars parallel to said supporting bars and having notched upper edges for receiv ing pallets therein, means for actuating the movablebars lengthwise to feed thepallets thereon forward,the rear pallet to a position directly underneath said mold box and the forward pallet with the finished block thereonfrom a position umlerneath the mold box to the extreme forward position beyond the mold and thereafter returning the movable bars rearward ly to receive other pallets in their notches, and common actuating means for operatim the mold box vertically and the-feed bars i ongitudinally.

20. In a block molding machine, the combi'nation of a frame, a mold box'mounted in said frame for vertical movement therein, spaced supporting bars in said frame lengthwise of the machine and at right angles to said box, movable bars guided in the machineframe parallel to said supporting bars and having notched upper edges for receiving pallet blocks therein, there being two notches in each bar for feeding two pallet blocks at one time, means for actuating said movable bars-forward to force the forward pallet withthe finished block thereon to an extreme position over said supporting bars and the rear pallet to a position beneath the mold box, means --for normally holding the forward ends of the movable bars upward during their forward movement and lowering them during their rearward movement,

and common actuating means for operating the mold box vertically and the movable bars longitudina1ly.-

21. In a block molding'machine the combination of a frame, a mold'box mounted for vertical movement therein, horizontal bars mounted lengthwise of the machine, a

feed box 'mounted for reciprocation above and in parallelism with said bars, stripper mechanism pivoted upon said frame above. said feed box for oscillation tmrard-and from the forward end of said feed box certain of said bars being fixed to the frame and extending forwardly beyond the mold box and the other of said bars mounted for reciprocation lengthwise of the fixed bars, the reciprocating bars having means for carrying pallets from a position in the rear of the mold boxto a position forward of the mold box by two movements,the first depositing vthe pallet beneath the mold box and the next movement forcing the pallet with the finished block thereon to the extreme forward position, means for actuating the mold box vertically and the reciprocating bars and feed box lengthwise thereof, and means for actuating the stripper mechanism to move the stripper rearwardly over the mold to retain the block in its lower osition, and withdraw the stripper-from, t e mold box after the block has been forced forward and the mold lowered.

In witness whereof I have hereunto set my hand this 21st day of August, 1926.

a JESSEHLBESSER. 

